Regular Expressions 101

Non-Capturing Group(?:\s*(?:\"([^\"]*)\"|([^,]+))\s*,?|(?<=,)(),?)+?

+?repeats the group contents below at least once:

1st Alternative\s*(?:\"([^\"]*)\"|([^,]+))\s*,?

\s*any whitespace character, repeated any number of times

Non-Capturing Group(?:\"([^\"]*)\"|([^,]+))

1st Alternative\"([^\"]*)\"

\"the literal " (34₁₀ / 42₈ / 22₁₆)

Group 1([^\"]*)

Negated Character Class[^\"]*

*matches any number of characters outside the set below:

\"the literal " (34₁₀ / 42₈ / 22₁₆)

2nd Alternative([^,]+)

Group 2([^,]+)

Negated Character Class[^,]+

+matches at least one character outside the set below:

,the literal , (44₁₀ / 54₈ / 2C₁₆)

\s*any whitespace character, repeated any number of times

,?optionally matches the literal , (44₁₀ / 54₈ / 2C₁₆)

2nd Alternative(?<=,)(),?

Positive Lookbehind(?<=,)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

Group 3() — does not consume characters

,?optionally matches the literal , (44₁₀ / 54₈ / 2C₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

(?:\s*(?:\"([^\"]*)\"|([^,]+))\s*,?|(?<=,)(),?)+?

New

   "  ab  cd  " ,    "  efgh,ijk.",,  4,"lmno", e " sdf " sdfpas,,,